Finding the Fourth Proportional to 1,307.34, 1,804.12 and 717.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307.34 : 1,804.12 = 717.89 : x
2. Step 2: Convert to fraction form
   1,307.34/1,804.12 = 717.89/x
3. Step 3: Cross multiply
   1,307.34x = 1,804.12 × 717.89
4. Step 4: Simplify right side
   1,307.34x = 1,295,148.89
5. Step 5: Solve for x
   x = 1,295,148.89/1,307.34
6. Step 6: Final answer
   x = 990.67